Direct growth of ultra-long platinum nanolawns on a semiconductor photocatalyst

Table 1 A summary of prior works on the template-less synthesis of Pt NWs

Method	Orientation	Surfactant (S) or reductant (R)	Diameter (nm)	Length	Crystallization	Precursor	Authors
Chemical reduction	〈111〉	PVP (S)	~5	~200 nm	Single-crystalline	H₂PtCl₆	Xia et al. [5–7]
Chemical reduction	-	CTAB (S)	2.2	Networks	Polycrystalline	K₂PtCl₄	Song et al. [8]
Photochemical reduction	〈111〉	CTAB (S)	3-4	20-60 nm	Single-crystalline	K₂PtCl₄	Krishnaswamy et al. [9]
Chemical reduction	〈111〉	HCOOH (R)	4	100-200 nm	Single-crystalline	H₂PtCl₆	Sun et al. [10–13]
Chemical reduction	-	Vitamin B₂ (R)	10	Several tens of nm	Polycrystalline	Pt metal salt	Nadagouda et al. [14]
Thermal-assisted photoreduction	〈111〉	-	32	6 μm	Single-crystalline	Na₂Pt(OH)₆	Our group